Fanfic is supposed to be a form of creative expression that is accessible to a wide range of audiences, including younger readers in many cases. Content like 'breast smother fanfic' is not in line with the values of a healthy and inclusive fanfic community. It can make people uncomfortable and may even be considered offensive.
There could be some extremely rare and underground works that might touch on this, but they are not something that should be actively sought or promoted due to their inappropriate nature. Most fanfic platforms have rules against such content.
A foot smother story could be about a prank. For example, in a group of friends, one friend jokingly put their foot over another's face while they were lying on the couch. Everyone had a good laugh about it.
One story could be in a circus act where a performer does a gentle facesitting stunt as part of an acrobatic display. It's more about balance and showmanship rather than any form of smothering. The other performers are there to ensure safety and it's all in good fun for the audience.
Breast expansion in fanfic often refers to a fictional concept where a character's breasts grow in size, usually in a fantastical or non - realistic way. A breast pump in this context might be a device used in the story related to the breast expansion plot, perhaps for some sort of experimental or medical - like purpose within the fictional world of the fanfic.
They can be used to add a unique and often unexpected element to the story. For instance, the breast expansion might be used to symbolize a character's transformation, and the breast pump could be a plot device that drives the story forward by either causing or resolving the expansion issue.